JP2001213558A - Film take-up method, take-up device, and its manufacturing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To generate a large tension easily and stably and facilitate separation of a bobbin after a web is taken up thereon. SOLUTION: A winding mechanism to take up a thin web 24 is equipped with a drive shaft 104 whereto a torque transmitting part 106 is fixed and a holder 116 which is rotatable relative to the drive shaft 104 and on whose peripheral surface 138 a spring 156 is fitted with cushion material members 142a-142c interposed, and a stopper 154 is installed in three chambers 146a-146c formed in the holder 116. A groove 204 is provided at the inside circumferential surface 202 of a bobbin 200 whereon a thin web 24 is wound round, and the cushion material members 142a-142c are fitted in the groove 204. Through the stopper 154, the pressing force of the spring 156 is applied to the bobbin 200 installed in the holder 116.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film winding method, a winding apparatus and a manufacturing apparatus for manufacturing a film from a web of a photographic photosensitive material.

[0002]

2. Description of the Related Art In recent years, a film winding device used in a film manufacturing apparatus is capable of forming a thin and narrow band member such as a 1/2 inch or 8 mm magnetic tape having a thickness of 10 to 20 μm. For winding, those having a tension variation rate of ± 5% or less at the time of winding are practically used.

However, in a winding apparatus for winding a wide band-shaped member having a thickness of 100 to 150 μm, such as a web for a photographic light-sensitive material, a tension fluctuation rate during winding is low. Has not yet been developed.

For example, as shown in FIG. 14, a conventional web winding device 1 includes a drive shaft 3 having an air tube 2 provided therein, and bearings 4 and 5 fixed to the drive shaft 3. It is composed of A core 7 for winding a web 6 is rotatably mounted on the outer peripheral surfaces of the bearings 4 and 5. A portion corresponding to the core 7 of the air tube 2 is provided with a displacement transmitting portion 9 to which a felt 8 is attached at a tip.

The felt 8 attached to the tip of the displacement transmitting portion 9 is expanded by injecting compressed air into the air tube 2 to expand the air tube 2 and displace the displacement transmitting portion 9 outward. Press against the inner wall of core 7 and slide.

That is, the conventional winding device 1 is configured to use the torque generated when the felt 8 slides with respect to the winding core 7 as tension when winding the web 6.

[0007]

However, in this conventional winding device 1, the tension is not stable, and the tension fluctuation rate is reduced only to about ± 15% even if the condition is maintained in good condition. The problem that tension cannot be obtained has been pointed out. In addition, the maximum tension is about 9.8 N from the relation of heat generation, and if a tension higher than this is to be obtained, a new problem that deformation occurs due to heat generation occurs.
In addition, since the air tube 2 is mounted in the drive shaft 3 and the felt 8 is attached to the tip of the displacement transmitting section 9, the structure is complicated and maintenance is required to be skilled.

Furthermore, in the winding device 1, the bearings 4, 5 and the core 7 are not fixed via fixing means. Therefore, when the web 6 is wound, the core 7 comes off from the bearings 4 and 5, and the web 6 cannot be accurately wound around the core 7.

Furthermore, when the core 7 is detached from the bearings 4 and 5 after the web 6 has been wound, the pressure at which the web 6 is wound is applied to the bearings 4 and 5 via the core 7. This requires a great deal of labor to separate the web 6 from the bearings 4,5.

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above problems, and has as its object to provide a film winding method and a film winding apparatus capable of easily and stably obtaining a desired tension. I do.

It is another object of the present invention to provide a film manufacturing apparatus capable of easily performing a work of removing a core after winding a web.

[0012]

In the film winding method according to the present invention, the torque characteristics of the holder which is fixed through the core and which is rotated via the torque generating means under the rotating action of the drive shaft is detected in advance. First, the web winding diameter of the core with respect to the web cutting length is detected. Next, the winding tension of the holder corresponding to the web winding diameter is calculated, and the rotation speed of the drive shaft is set based on the torque characteristics so that the calculated winding tension is obtained.

[0013] Thus, when winding the web on the core, a stable winding tension can always be reliably obtained. For example, various webs having different thicknesses can be wound with high precision. Become.

Further, the present invention provides a step of setting a slip rotation speed according to a torque characteristic of a holder, and a step of setting a web winding diameter by using an outer diameter of a winding core, a thickness of a web, and a cut length of the web. Calculating the winding tension corresponding to the initial tension and the tension change rate set in accordance with the winding diameter, and adding the slip rotation speed to the winding rotation speed of the holder for driving. Setting the number of rotations of the shaft. Therefore, with simple control, the web can be wound with a desired winding tension with high accuracy, and it is possible to effectively cope with a change in the thickness of the web.

Further, in the film winding device according to the present invention, when the web is wound, the holder rotatably mounted on the drive shaft via the torque generating means, the connected member having the connecting groove, and There is provided a winding mechanism having a lock means for preventing the core from falling off from the holder, and a plurality of the winding mechanisms are connected by a connecting member fitted in the connecting groove.

In the film winding device having the above configuration, the torque generating means includes a magnet and a copper plate selectively provided on the drive shaft and the holder.
Therefore, a relatively large tension can be obtained with a simple configuration, and in particular, a web having a large thickness can be wound around the core with high precision.

Further, the locking means includes a stopper for pressing the core toward the outside of the holder, and the stopper moving the stopper in a direction to increase the pressing force applied to the core prior to winding the web. Preferably, a moving means is provided for moving the stopper in a direction to reduce the pressing force applied to the core when the core wound with the web is removed from the holder. Furthermore, the transportation means
Preferably, the holder has a chamber defined by a tapered surface at the bottom, and a portion of the stopper protrudes from the outer peripheral surface of the holder and is rotatably disposed in the chamber.

Thus, during the web winding operation,
It is possible to prevent the core from falling off the holder under the action of the pressing force. Further, after the web winding operation is completed, by rotating the core in a direction opposite to the direction in which the web is wound, a push applied to the outside of the holder via a stopper with respect to the core is provided. The pressure is released, and the core can be easily detached from the winding mechanism.

A pressing force may be applied to the core via a stopper by an elastic member wound around the holder.
A cushion material pressed inward of the holder by the elastic member may be brought into contact with the outer peripheral surface of the holder.

The torque generated by the drive shaft may be transmitted to the winding core via a stopper. Further, it is preferable that a groove for fitting with the cushion material is formed in the core. This is because the holder and the core are firmly fixed.

In this case, the connecting member may be made of resin. By using the resin connecting member, it is possible to reduce the weight of the connected winding mechanism, and it is possible to prevent generation of abnormal noise such as metal noise when the winding mechanism is driven. . Furthermore, since the winding mechanism can be connected without providing a connecting member to the drive shaft,
Applying an unnecessary load to the drive shaft can be avoided, and the drive shaft can be prevented from being deformed.

It is preferable to install bolts at both ends of the plurality of connected winding mechanisms to prevent disconnection. This is because the web can be smoothly wound without disconnecting the winding mechanism even while the drive shaft is rotating.

Further, in the film manufacturing apparatus according to the present invention, the roller for absorbing the fluctuation of the web tension and detecting the value of the tension, the roller for extending the wrinkles of the web, and the center of the web are positioned. A cutting section having a blade for cutting the web; and a winding mechanism for winding the web around a core. For this reason, a stable winding tension can always be provided, and the web cut to a desired length with respect to the winding core is wound with high accuracy, and the slit width accuracy and the cut surface are improved. Efficient and highly accurate film manufacturing operations can be performed.

[0024]

FIG. 1 is an explanatory view showing a schematic configuration of a film manufacturing apparatus 10 according to an embodiment of the present invention.

The film manufacturing apparatus 10 includes a supply device 12 for sending out a web 22 from a roll-shaped web raw material 20,
A transport device 14 for transporting the web 22 sent from the supply device 12 to a cutting device 16, and a narrow web (for example, the width of a movie film) cut continuously to a predetermined width by the cutting device 16. The first step including the step of winding the
And the winding device 18 according to the embodiment.

The supply device 12 is provided with a supply shaft 28 that is driven to rotate by a motor 26 and sends out the web 22 from the rolled web 20, an edge of the fed web 22, and the transport device 14. An E / P (edge position) detector 30 for detecting a deviation from the end of the transport roller 32 is provided.

In the transport device 14, a number of transport rollers 32 are arranged on the transport path of the web 22 before cutting. The transfer device 14 absorbs a change in the tension of the web 22 during the transfer, and controls a transfer speed of the web 22 with a dancer roller unit 34 connected to a detector (not shown) for detecting the value. , A suction roller 36 as a main feed roller, and three crown rollers 38 for extending wrinkles of the web 22.

The suction roller 36 has a large number of air suction holes formed on the peripheral surface thereof, and conveys the web 22 while closely contacting the web 22 by suction of air so that no slip occurs.

The dancer roller section 34 is shown in FIGS.
As shown in FIG. B, a guide portion 48 made of, for example, plastic or metal and having a slit 46 formed in a vertical direction, and rollers 50 provided at upper and lower portions inside the guide portion 48, 52, a belt 54 stretched between the rollers 50 and 52, and a belt 54 provided at a portion close to the slit 46 and moving vertically along the slit 46 outside the guide portion 48. It has a freely movable dancer roller 56 and a weight 58. The weight 58 is caused by a sudden drop of the dancer roller 56 due to its own weight,
The belt 54 is provided on a portion of the belt 54 opposite to the portion on which the dancer rollers 56 are provided in order to prevent a rapid rise.

The web 22 conveyed from the conveying device 14 is narrowed (for example, the width of a movie film) by the cutting device 16.
An upper blade 40 and a lower blade 42 for cutting into two pieces are arranged such that their cutting edges face each other. The narrow web 24 cut to a predetermined width by the cutting device 16 is positioned at the center thereof by a number of pass rollers 44 arranged in the winding device 18, and then the narrow web is wound on the winding core. It is sent to a winding mechanism 100 for winding the 24.

A film manufacturing apparatus 1 according to the first embodiment
0 is configured as described above. Next, its operation will be described.

First, the web 22 unwound from the roll-shaped raw web 20 being rotated by the supply shaft 28 is
By passing through the E / P detector 30, the web 22
Is corrected and the edge is conveyed to the dancer roller section 34 after the deviation of the edge of the transport roller 32 is corrected.

A tension detector (not shown) is connected to the dancer roller section 34, and the tension of the web 22 is detected by the detector. Based on the detection result, the dancer roller 56 is moved by an adjuster (not shown) so that a desired tension is applied to the web 22, and the tension applied to the web 22 is adjusted.

The web 22 to which the desired tension has been applied by the dancer roller section 34 passes through the transport roller 32, the wrinkles of the web 22 are extended by the crown roller 38, and reaches the suction roller 36.

When the web 22 reaches the suction roller 36, the web 22 is attracted to the suction roller 36 by the suction action, and the suction roller 36 rotates to cut the web 22 via the web 22, the transport roller 32 and the crown roller 38. It is sent to the device 16. The web 22 before cutting that has reached the cutting device 16 is cut by an upper blade 40 and a lower blade 42 whose cutting edges face each other to form a plurality of narrow webs 24.

The narrow web 24 after the cutting is positioned at the center of the narrow web 24 by a pass roller 44 installed in the winding device 18. It is wound by the winding mechanism 100.

Next, a winding mechanism 100 constituting the winding device 18 according to the first embodiment will be described with reference to FIGS.

As shown in FIG. 3, the winding mechanism 100
Are connected via a spacer 250. As described later, the torque transmission unit 1 of each winding mechanism 100
06, six connecting grooves 118a to 118f,
The support member 10 is opposed to each of the connection grooves 118a to 118f.
8, 110 formed in three grooves 119a-1
The key 252 made of resin is fitted with the key 19c. Thereby, the winding mechanism 100 is connected (FIG. 4).
reference).

At both ends of the connected winding mechanism 100, a plurality of bolts 256 for preventing the connection of the winding mechanism 100 from being disconnected are provided. Support member 254 fixed to drive shaft 104 by bolt 256
Is pressed in the axial direction to prevent disconnection of the winding mechanism 100 (see FIG. 5).

By using the resin key 252 to connect the respective winding mechanisms 100, the weight of the connected winding mechanisms 100 can be reduced, and when the winding mechanisms 100 are driven, Generation of abnormal noise such as metal noise can be prevented. Since there is no need to provide a key on the drive shaft 104 to connect the winding mechanism 100, it is possible to avoid applying an extra load to the drive shaft 104 and to prevent the drive shaft 104 from being deformed. Can be

Next, the configuration of one winding mechanism 100 will be described with reference to FIGS. As shown in FIGS. 6 and 7, the winding mechanism 100 has a drive shaft 104 having a hollow portion 102 extending in the axial direction, and a torque fixed to the drive shaft 104 by rotating the drive shaft 104. Transmitting portion 106 for transmitting the torque, and a metal supporting member 10 fixed to the torque transmitting portion 106
8, 110, and a holder 116 rotatably attached to the drive shaft 104 via a first bearing 112 and a second bearing 114.

FIGS. 6 and 8 show the torque transmitting section 106.
As described above, as described above, the six connection grooves 118 formed in the direction along the drive shaft 104 for connecting a plurality of the winding mechanisms 100 via the resin key 252.
a to 118f and a circumferential groove 121 formed on the inner peripheral surface thereof
And

Each of the supporting members 108 and 110 is
0 is a metal annular member having a connecting groove 118a-
Three grooves 119a to 119c opposed to the shaft 118f are formed in the support members 108 and 110, respectively.
On the side not fixed to 6, the seamless ring-shaped copper plates 122a and 122b are crimped respectively.

The holder 116 has inner peripheral surfaces 124 and 126
A plurality of permanent magnets 132 are arranged on the inner peripheral surfaces 124 and 126 via magnet holders 128 and 130. The plurality of permanent magnets 132 are arranged at equal pitch intervals so that the permanent magnet rows 134, 1
36. Ring-shaped copper plates 122a, 122
b and the permanent magnet arrays 134 and 136 are arranged so as to face each other in the radial direction of the drive shaft 104, and constitute a torque generating unit 137.

At the center of the outer peripheral surface 138 of the holder 116,
Three cushion members 142a to 142c made of rubber are in contact with the drive shaft 104 at an interval of about 120 °. The longitudinal direction of the cushion members 142a to 142c is the radial direction of the drive shaft 104. Cushion material 142
The length in the longitudinal direction of a to 142c is 30 mm to 7 mm.
0 mm is preferable, and more preferably 30 mm to 50 m
m.

The holder 116 has a cushion material 142a.
To 142c, a tapered surface 144 having an inclined bottom.
Three chambers 146a to 146c designated as a to 144c are provided. In each of the chambers 146a to 146c, there is disposed a stopper 154, a part of which protrudes from the outer peripheral surface of the holder 116 (see FIGS. 9 and 10A).

A circular groove 150 is provided on the central axis 148 of the stopper 154, and cylindrical members 152a and 152b are fixed to both ends of the central axis 148. The stopper 154 is movable on the tapered surfaces 144a to 144c at the bottoms of the chambers 146a to 146c.

A spring 156 for pressing the cushion members 142a to 142c inward of the holder 116 is wound around the outer peripheral surface 138 of the holder 116. The cushion members 142a to 142c are fixed to the holder 116. ing. The spring 156 is inserted from the holder 116 side into a groove 150 provided on the center shaft 148 of the stopper 154, and the stopper 154 is pressed to the outside of the holder 116.

The stopper 154 is in contact with the inner peripheral surface 202 of the core 200 mounted on the holder 116. Spring 1
The pressing force of 56 is applied to the core 200 via the stopper 154, and this pressing force is applied to the narrow web 24.
It works even during the winding operation.

At the center of the inner peripheral surface 202 of the core 200, a groove 20 for fitting with the cushion members 142a to 142c is provided.
4 is formed around the core 200 in the radial direction.
By fitting the grooves 204 into the cushion members 142a to 142c, the core 200 can be firmly fixed to the holder 116, and the core 200 can be fixed even during the winding operation of the narrow web 24. This prevents the holder 116 from falling off.

A cooling means for cooling at least the drive shaft 104 and the holder 116 is provided. The cooling means includes a cooling hole 140 provided through the torque transmitting unit 106 and the drive shaft 104, and an intake device (not shown) provided at an end of the drive shaft 104. I have.

By operating the air suction device, the copper plate 122 pressed against the metal supporting members 108 and 110 is pressed.
The cooling air from the outside is guided to the holder 116 through a gap between the permanent magnet rows 134 and 136 and the gap between the permanent magnets 132, and the cooling wind guided to the holder 116 is used for cooling. The drive shaft 104 passes through the hole 140
To the inside of the hollow portion 102. Support member 10
Cooling air is guided from outside to the holder 116 through the hollow portions 120 of the shafts 8 and 110, and the cooling wind guided to the holder 116 passes through the cooling holes 140 and is guided into the hollow portion 102 of the drive shaft 104. Will be. The cooling means is the holder 1
The function is such that cooling air is introduced into the holder 116 from the outside of the holder 16 toward the hollow portion 102 of the drive shaft 104.

The winding device 18 according to the first embodiment
Is configured as described above. Next, the operation and effect thereof will be described with reference to FIGS. 10A to 11.

First, the winding core 200 is firmly fixed to the holder 116 by the lock means. The locking means includes a stopper disposed in the holder 116 in a direction to increase the pressing force applied to the core 200 toward the outside of the holder 116 before winding the narrow web 24. Fifteen
4 is to be moved.

The chambers 146a-146 provided in the holder 116
The stopper 154 disposed in the inside of the chamber 146c is connected to the tapered surface 144a-144 at the bottom of each of the chambers 146a-146c.
c is located at the lowest position (see FIG. 10A). At this time, the stopper 154 has a part thereof protruding from the outer peripheral surface of the holder 116.

Next, the groove 204 formed in the inner peripheral surface 202 of the core 200 is
Cushions 142a-142 pressed inward of
c. Thus, in a state where the stopper 154 presses the core 200 outward of the holder 116,
The core 200 is mounted on the holder 116 (FIG. 10B).
reference). At this time, the center position of the holder 116 and the core 200
Is the same as the center position.

Then, with the core 200 mounted on the holder 116, the core 200 is rotated in the direction in which the narrow web 24 is wound (the rotation direction of the drive shaft 104). As the core 200 rotates, the stopper 154 also moves between the inner peripheral surface 202 of the core 200 and each of the chambers 146 a to 146.
6c between the tapered surfaces 144a to 144c at the bottom of the tapered surfaces 144a to 144c (FIG. 10C).
Slide).

The stopper 154 has tapered surfaces 144a to 144a.
4c, the portion of the stopper 154 protruding from the outer peripheral surface of the holder 116 increases. Therefore, the pressing force of the stopper 154 pressing the core 200 from the inner peripheral surface 202 of the core 200 toward the outside of the holder 116 increases.

Further, the pressing force of the spring 156 wound around the holder 116 applies the stopper 15
4 is provided outside of the holder 116. Accordingly, the pressing force from the stopper 154 and the pressing force from the spring 156 are applied to the outside of the holder 116 with respect to the core 200, so that the core 200 is
Will be firmly fixed.

Even while the narrow web 24 is being wound on the core 200, the core 200 is held by the pressing force from the stopper 154 and the spring 156.
16 is firmly fixed. Therefore, it is possible to prevent the core 200 from falling off from the holder 116 and to accurately wind the narrow web 24 around the core 200.

After the core 200 is firmly mounted on the holder 116, the drive shaft 104 is driven to rotate. Thereby,
The torque transmission unit 106 fixed to the drive shaft 104
The torque transmission unit 10 rotates in accordance with the drive shaft 104.
The copper plates 122a, 122b pressed against the support members 108, 110 fixed to the
The magnetic flux generated by the permanent magnet 132 constituting the 136 is cut off.

As a result, eddy currents are generated in the copper plates 122a and 122b, and the secondary magnetic flux and the original magnetic flux due to the eddy currents attract each other, so that the slip rotation speed N (the rotation speed of the drive shaft 104 and the holder 116). (Difference) is obtained. The generated torque is applied to the stoppers 15 arranged in the chambers 146a to 146c provided in the holder 116.
4 and the core 200 attached to the holder 116
Is transmitted to

In the winding device 18 according to the first embodiment, the holder 116
Torque can be generated in a non-contact manner with respect to photographic photosensitive materials such as webs (films).
Even when a wide band-shaped member having a thickness of 100 to 150 μm and a wide width is wound, the tension variation rate is ±
5% or less, and a large tension can be easily and stably obtained.

Since a stable winding tension can be obtained, the deviation (defective winding appearance) in the width direction (slit width direction) of the wound state can be reduced. For example, 2.0 to 5.0 mm. 0.5-1.
It can be reduced to about 0 mm. As a result, the rubbing of the edges of the webs after winding can be almost eliminated, so that there is an effect that there is little damage and edge damage can be reduced.

Further, a web (film) for a photographic light-sensitive material
Not limited to, the thickness is 50 to 300 μm and the width is 15 to 70 m
m, and a relatively thick and wide band-like member (for example, paper,
It can be suitably operated also when winding up a cloth.

In the first embodiment, the structure
Since there is no contact portion such as felt and there is no need to mount an air tube in the drive shaft 104, there is no need to consider the life due to abrasion of the constituent members and the like, and maintenance becomes easy.

By the way, the thickness is as thin as 10 to 20 μm,
In addition, when winding a narrow band-shaped member, the tension can be reduced, so that the calorific value is small, and the natural cooling of the system itself is sufficient, but the thickness is small, such as a web for photographic photosensitive materials. In the case of winding a wide band member having a thickness of 100 to 150 μm and a wide width, the calorific value increases. Therefore, if the belt is left as it is, the narrow web 24 may be deformed by the heat generation.

However, in the first embodiment, since the cooling means is provided, it is possible to effectively cool the heat generated at the time of winding, and the narrow web 24 generated by the heat is generated.
Can be avoided.

In particular, the drive shaft 104 and the torque transmitting unit 10
6, support members 108 and 110, and ring-shaped copper plate 12
2a and 122b are integrally held, and
The drive shaft 104, the torque transmitting unit 106, the support member 1
08, 110 and the copper plates 122a, 122b are all made of metal. For this reason, the heat generated in the copper plates 122a and 122b, which are heat sources of the heat generated during winding,
The power is easily transmitted to the drive shaft 104 through the support members 108 and 110 and the torque transmission unit 106, and the cooling efficiency can be further improved.

Further, in the first embodiment, two bearings 112, 114 are used for one holder 116. However, in order to reduce the variation in torque between these bearings 112, 114, each bearing Bearing 1
After the grease has been removed by washing the substrates 12, 114 once, several drops of oil having a viscosity of SAE 20 to 30 are injected.

Further, in the first embodiment,
The magnet holder 1 is provided on the inner peripheral surfaces 124 and 126 of the holder 116.
Before arranging the plurality of permanent magnets 132 at equal pitches via the 28 and 130, for all of the permanent magnets 132,
Measure the strength of the magnetic force.

After that, the magnet holder 12 is
When the permanent magnets 132 are arranged via the first and second permanent magnets 8 and 130 to form the permanent magnet rows 134 and 136, each of the permanent magnets 13
Of the two magnets, those having a strong magnetic force and those having a weak magnetic force are alternately arranged so that the magnetic force of the permanent magnet rows 134 and 136 is uniform (the number of permanent magnets 32 is as large as possible). To place more). As a result, the balance of the magnetic force can be made uniform and the magnetic flux density can be increased, so that the slip rotation speed N decreases and the amount of generated heat can be reduced.

By the way, there is an ideal tension curve for winding the narrow web 24. Normally, when the narrow web 24 is wound by the winding mechanism 100, the winding diameter of the narrow web 24 around the holder 116 increases with the winding, and the holder 11
The number of rotations of 6 decreases. Along with this, as shown in FIG. 11, the tension curve (curve a) also decreases, and may deviate from the ideal tension curve (curve b). Therefore, the tension curve (curve a) can be made closer to an ideal tension curve (curve b) by increasing the rotation speed of the drive shaft 104, which is usually fixed, by about 20 to 30%.

The ideal tension curve (curve b) varies depending on the material and dimensions of the belt-like member wound around the holder 116. As described above, the rotation speed of the drive shaft 104 is appropriately selected according to the winding diameter. Thereby, it is possible to approximate the tension curve which is most optimal for winding the belt-shaped member.

After the winding of the web 24 is completed, the winding pressure of the narrow web 24 is applied to the core 200, so that the conventional winding device 1 (see FIG. 14).
Thus, a great deal of labor was required to separate the winding core 200 from the winding device 1.

However, in the winding mechanism 100, the winding core 20 on which the narrow web 24 is wound is used.
0 is rotated in the direction opposite to the direction in which the narrow web 24 is wound (in the direction opposite to the rotation direction of the drive shaft 104), so that the stoppers 154
Slides to the lowermost position (see FIG. 10A) of the inner bottom tapered surfaces 144a to 144c.

Therefore, the pressing force applied to the core 200 to the outside of the holder 116 by the stopper 154 and the spring 156 is reduced, and the core 200 is easily detached from the holder 116. Can be.

FIG. 12 is an explanatory view of a partially omitted configuration of a film manufacturing apparatus 300 according to the second embodiment of the present invention.
Note that the same components as those of the film manufacturing apparatus 10 according to the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

The film manufacturing apparatus 300 includes a transport device 302, a cutting device 304, and a winding device 306 according to the second embodiment.
A tension pickup 308 is incorporated between the winding device 306 and the winding device 306 as needed. In the cutting device 304, a disc-shaped upper blade 40a and a disc-shaped lower blade 42a for cutting the web 22 into a narrow width are arranged so that their cutting edges face each other.

The film manufacturing apparatus 300 includes a first servomotor 310 for controlling the drive of the suction roller 36.
A second servomotor 312 for rotating and driving the lower blade 42a, and a third servomotor 314 for rotating and driving the drive shaft 104;
Servo motors 310, 312 and 314 are controlled by controller 322 via first to third servo drivers 316, 318 and 320.

A first pulse generator 324 for detecting the rotation of the suction roller 36, a second servo motor 312
A second pulse generator 326 for detecting the rotation of the first servomotor 314 and a third pulse generator 328 for detecting the rotation of the third servomotor 314. The first to third pulse generators 324, 326 and 328 are provided with the first to third pulse generators. A pulse signal is sent to the servo drivers 316, 318 and 320 and the controller 322.

The controller 322 receives an input of the thickness t of the web 22 and calculates a web winding radius R of the winding core 200. The controller 322 calculates an initial tension (tension) and tension to be obtained at the time of winding. A PI control circuit 332 is provided for setting the rate of change (taper setting), inputting the winding tension characteristic, and performing PI control on the information. Outputs from the arithmetic circuit 330 and the PI control circuit 332 function as drive signals for driving the third servo motor 314 via the third servo driver 320.

The film manufacturing apparatus 3 configured as described above
The operation of the winding device 306 at 00 will be described below.

First, based on the winding length (cut length) L of the web 22, the thickness t of the web 22 and the diameter D 0 of the core 200, the web winding diameter D of the core 200 is calculated by an arithmetic circuit 330. Is calculated by In particular,

[0085]

(Equation 1)

The web winding diameter D is calculated based on the equation (1).

Therefore, as shown in FIG.
The relationship between the cutting length L and the web winding radius R is obtained,
The winding tension corresponding to the web winding radius R is calculated. At that time, the initial tension is set as, for example, 1000 g as the tension value,
A tension change rate (taper setting) corresponding to a change in the web winding radius R is set.

The number of revolutions of the suction roller 36 is input to the arithmetic circuit 330 from the first pulse generator 324, and the cutting length L of the web 22 is always input and the web winding radius R corresponding to the cutting length L is input. Is calculated.
The controller 322 calculates a winding tension corresponding to the web winding radius R, and calculates a winding torque corresponding to the calculated winding tension.

At this time, as shown in FIG.
Is set so as to correspond to the cutting length L, and the slip rotation speed corresponding to the calculated winding torque is set so that the calculated winding tension is obtained. A torque rotation speed N1, which is the rotation speed of the drive shaft 104, is set by adding to the winding rotation speed N. The slip rotation speed is determined by the drive shaft 104 and the holder 11.
6, which is the torque characteristic of the holder 116, which is set in advance by experiment in relation to the winding torque.

As described above, in the second embodiment, the rotation of the suction roller 36 causes the first pulse generator 32 to rotate.
4, the cutting length L of the web 22 is input to the arithmetic circuit 330, the winding tension is calculated based on the web winding radius R calculated by the arithmetic circuit 330, and the winding tension is obtained. As described above, the slip rotation speed according to the torque characteristic of the holder 116 is added to the winding rotation speed N of the holder 116, and the drive shaft 10
4 (torque speed N1) is set.

Thus, in the winding device 306, the web 22 is always wound with a stable tension applied to the winding core 200, and the winding operation of the web 22 can be performed with high accuracy. The effect of being performed is obtained. In addition, it is possible to easily cope with the variation in the thickness t of the web 22, and the film winding process set to various web winding radii R is efficiently and accurately performed with a simple control. .

In particular, in the winding device 306, as in the first embodiment, the torque generating means 137 constituting the magnet holder is used, and the torque can be generated by contacting the holder 116. For this reason, the same effects as those of the first embodiment can be obtained, for example, it is possible to easily and stably obtain a large tension.

As shown in FIG. 12, a tension pickup 308 is incorporated, and a change in torque due to aging or temperature is detected by the tension pickup 308. Then, by feeding back and correcting this torque change, a more stable winding torque can be obtained.

The first to third servomotors 310,
In 312 and 314, similar effects can be obtained by using an AC servo, or controlling by a DC servo and a transmission.

[0095]

As described above, according to the film winding method and apparatus according to the present invention, the winding tension of the holder corresponding to the web winding diameter is calculated.
In order to obtain this calculated winding tension,
The rotation speed of the drive shaft is set. Then, the rotation of the holder via the torque generating means is controlled by the rotation of the drive shaft, so that the web fixed to the holder can always be wound with a stable winding tension. Therefore, with a simple configuration and control, webs having various thicknesses and different cutting lengths can be wound around the core with high precision.

Further, according to the film manufacturing apparatus of the present invention, when winding a wide band-like member having a thickness of 100 to 150 μm and a wide width, such as a web (film) for a photographic photosensitive material, The fluctuation rate can be reduced to ± 5% or less, a large tension can be easily and stably obtained, maintenance can be facilitated, and the core can be easily removed after the web is wound. The following effect can be obtained.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a film manufacturing apparatus according to a first embodiment of the present invention.

FIG. 2A is a front view showing a dancer roller unit;
FIG. 2B is a longitudinal sectional view showing the dancer roller portion.

FIG. 3 is a partial longitudinal sectional view showing a state in which a plurality of winding mechanisms constituting a winding device according to a first embodiment incorporated in the film manufacturing apparatus are connected.

FIG. 4 is an enlarged sectional view showing a connecting portion of the winding mechanism.

FIG. 5 is a partially enlarged longitudinal sectional view showing a state in which a plurality of the winding mechanisms are connected.

FIG. 6 is a longitudinal sectional view showing a configuration of the winding mechanism.

FIG. 7 is a side view from the arrow VII in FIG. 6;

FIG. 8 is a perspective view illustrating a torque transmission unit according to the first embodiment.

FIG. 9 is an enlarged sectional view showing a stopper according to the first embodiment.

FIG. 10A is an enlarged sectional view showing a position of a stopper in a chamber before mounting a core, and FIG. 10B is an enlarged sectional view showing a position of a stopper in the chamber when the core is mounted. FIG. 10C is an enlarged sectional view showing the position of the stopper in the chamber when the core is rotated and fixed to the holder.

FIG. 11 is a characteristic diagram showing a change in tension with respect to a winding diameter.

FIG. 12 is a partial schematic configuration diagram of a film manufacturing apparatus incorporating a winding device according to a second embodiment.

FIG. 13 is a diagram illustrating a relationship between a cutting length, a web winding radius, and a rotation speed.

FIG. 14 is a longitudinal sectional view showing a configuration of a conventional winding device.

[Explanation of symbols]

10, 300: Film manufacturing device 16: Cutting device 18, 306: Winding device 22: Web 24: Narrow web 38: Crown roller 40, 40a: Upper blade 42, 42a: Lower blade 44: Pass roller 56: Dancer roller 100 .. Winding mechanism 104 Drive shaft 106 Torque transmitting section 116 Holder 118a-118f Connecting groove 122a, 122
b: copper plate 132: permanent magnet 137: torque generating means 142a to 142c: cushion material 144a to 144
c ... tapered surface 146a-146c ... chamber 154 ... stopper 156 ... spring 200 ... core 204 ... groove 252 ... key 256 ... bolt 302 ... transfer device 304 ... cutting device 310,312,
314 servo motor 322 controller 330 arithmetic circuit 332 PI control circuit

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Fujio Kuwahara 210 Nakanakanuma, Minamiashigara, Kanagawa Prefecture Fuji Photo Film F-term (reference) 3F055 AA06 BA25 CA09 DA01 3F105 AA06 AB17 BA02 BA27 CC01 DA01 DA42

Claims (13)

[Claims] 1. A film in which a core is fixed to a holder rotatably mounted on a drive shaft via a torque generating means, and a web is wound around the core by a predetermined tension by rotating the drive shaft. A winding method, wherein a step of detecting a torque characteristic of the holder in advance, a step of detecting a web winding diameter of the core corresponding to a cutting length of the web, and a step corresponding to the web winding diameter are performed. Calculating the winding tension of the holder, so that the calculated winding tension is obtained,
Setting a rotation speed of the drive shaft based on the torque characteristics. 2. A film winding method according to claim 1, further comprising the steps of: setting a slip rotation speed according to a torque characteristic of said holder; and an outer diameter of said winding core, a thickness of said web, and a thickness of said web. Calculating the web winding diameter using the cutting length, and setting an initial tension and a tension change rate corresponding to the web winding diameter, and setting the winding tension corresponding to the initial tension and the tension change rate. Calculating, so that the calculated winding tension is obtained,
Setting a rotation speed of the drive shaft by adding the slip rotation speed to a winding rotation speed of the holder. 3. A holder rotatably mounted on a drive shaft via a torque generating means, a connected member having a connection groove formed therein, and a core falling off from the holder when the web is wound up. A film winding device, comprising: a winding mechanism having a locking means for preventing the film, and a plurality of the winding mechanisms connected by a connecting member fitted in the connecting groove. 4. A film winding device according to claim 3, wherein said torque generating means includes a magnet and a copper plate selectively provided on said drive shaft and said holder. 5. The film winding device according to claim 3, wherein the locking means includes a stopper for pressing the core toward the outside of the holder, and the winding means prior to winding the web. A direction in which the stopper is moved in a direction to increase the pressing force applied to the core, and a pressing force applied to the core when the core wound with the web is removed from the holder; And a moving means for moving the stopper. 6. A film winding device according to claim 5, wherein said moving means has a chamber defined by said holder and having a tapered surface at the bottom, and said stopper has a part formed on an outer peripheral surface of said holder. A film take-up device protruding from the chamber and rotatably disposed in the chamber. 7. The film winding device according to claim 5, wherein a pressing force is applied to the core through the stopper by an elastic member wound around the holder. Taking device. 8. The film winding device according to claim 7, wherein a cushion material pressed inward of the holder by the elastic member is in contact with an outer peripheral surface of the holder. Winding device. 9. The film winding device according to claim 5, wherein the torque generated by the drive shaft is transmitted to the winding core through the stopper. Taking device. 10. The film winding device according to claim 8, wherein a groove for fitting the cushion material is formed in the winding core. 11. The film winding device according to claim 3, wherein the connecting member is made of a resin. 12. The film winding device according to claim 3, wherein a plurality of bolts for preventing disconnection are provided at both ends of the winding mechanism connected to the film winding device. A film winding device. 13. A roller that absorbs fluctuations in the tension of the web and detects the value of the tension, a roller that extends the wrinkles of the web, a roller that positions the center of the web, and cuts the web. A cutting portion having a blade, and a winding mechanism for winding the web around a winding core, wherein the winding mechanism includes a holder rotatable with respect to a drive shaft, and a connected member having a connection groove. And a lock means for preventing the winding core from falling off from the holder when winding the web, and a plurality of the winding mechanisms are connected by a connecting member fitted in the connecting groove. A film manufacturing apparatus.